Rochester is a very small village located in the state of Illinois. With a population of 4,044 people and two associated neighborhoods, Rochester is the 407th largest community in Illinois. Much of the housing stock in Rochester was built relatively recently. The construction of new real estate can often be taken as an indication that the local Rochester economy is robust, and that jobs or other amenities are attracting an influx of new residents. This seems to be the case in Rochester, where the median household income is $117,118.00.

Also of interest is that Rochester has more people living here who work in computers and math than 95% of the places in the US.

A relatively large number of people in Rochester telecommute to their jobs. Overall, about 19.12% of the workforce works from home. While this may seem like a small number, as a fraction of the total workforce it ranks among the highest in the country. These workers are often telecommuters who work in knowledge-based, white-collar professions. For example, Silicon Valley has large numbers of people who telecommute. Other at-home workers may be self-employed people who operate small businesses out of their homes.

Because of many things, Rochester is a great place for families with children to consider. First of all, many other families with children live here, making Rochester a place where both parents and children are more likely to develop social ties with other families, as well as find family-oriented services and community. The village’s good public school district and large population of college-educated adults provide an environment conducive to academic values. With regard to real estate, Rochester has a high rate of owner-occupied single family homes, which tends to reflect stability in the local community. Finally, Rochester’s overall crime rate is lower than average for the country.

Rochester is a small village, and as such doesn't have a public transit system that people use to get to and from their jobs every day.

The citizens of Rochester are among the most well-educated in the nation: 47.92% of adults in Rochester have a bachelor's degree or even advanced degree, whereas the average US city has 21.84% holding at least a bachelor's degree.

The per capita income in Rochester in 2022 was $47,762, which is wealthy relative to Illinois, and upper middle income relative to the rest of the US. This equates to an annual income of $191,048 for a family of four.

The people who call Rochester home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Rochester residents report their race to be White, followed by Asian. Important ancestries of people in Rochester include German, English, Irish, Italian, and Polish.

The most common language spoken in Rochester is English. Other important languages spoken here include Italian and Polish.